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Device and method for aiding the positioning of an external part relative to an implantable part of a charging system for an implantable medical device

  • US 6,088,619 A
  • Filed: 08/10/1999
  • Issued: 07/11/2000
  • Est. Priority Date: 02/26/1999
  • Status: Expired due to Term
First Claim
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1. Device for aiding the positioning of an external part relative to an implantable part of a charging system for charging a rechargeable power source of an implantable medical device comprising,an external transmitting part including a transmitting resonant circuit with a transmitting coil;

  • an implantable receiving part including a receiving resonant circuit with a receiving coil, said transmitting coil being adapted to be inductively coupled to said receiving coil by manual positioning of said external transmitting part thereby allowing transcutaneous power transmission;

    an oscillator connected to said transmitting resonant circuit, said oscillator having a resonant frequency which shifts as a function of the inductive coupling between said transmitting coil and said receiving coil;

    a measurement arrangement for determining frequency detuning of said oscillator; and

    an evaluation arrangement for outputting a positioning signal as a function of the determined frequency detuning of said oscillator.

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